Major Issues & Problems with Dell XPS 12 Convertible Ultrabook Tablet?

I had the (refurbished) XPS 12 Convertible for about 10 hours now and I am scared of what I have seen so far and what there is to come.

1.  WiFi connectivity gets lost/broken very often and/or stuck in 'Limited' status (no connectivity).

2. WiFi always is disconnected after closing / opening the lid and often times is unable to get signal back (or takes long time 3-7 minutes) for the signal to return. I have made the appropriate setting adjustment for windows not to cut power to the WiFi Card when in sleep mode, and also set the power settings to Maximum Performance. No luck.  I have installed all of the latest drivers from Dell and, with support, also tried the Intel (more updated) drivers for Intel Centrino Advanced-N 6235. No luck. Update to new Bios, still no major improvement. After hours with Dell support, it looks like they will send someone over to replace the WiFi card.

I was hoping that was it and that's the only issue I'd deal with. But wait, there is more:

3. Track pad is odd. I am not doing anything fancy, I just want to use it as a courser and left/right mouse click. Sometimes it is totally unresponsive, you have to move your hand off of it and try again for it to register that you are touching it. Sometimes it ignores left or right mouse clicks as if they never happened.

4. Screen brightness a mind of its own too. I have set the screen to be on Maximum brightness in all conditions (power & battery) and have disabled any dell options, that I can find, for it to manage brightness for me. Yet, half of the time it is at half brightness (thought I set it to maximum) and dims/goes bright on its own as needed. Is there a hidden option/menu for this 'feature'? The only way to get the full-brightness back on is to close the lid and open it again, it starts with full brightness (for a while).

5. The auto-rotate sometimes doesn't register that the screen was flipped . I simply have to move it to another side and back to the position that I want in order for me to get it to rotate correctly (I have not disabled auto rotate). I am scared of what I have seen so far.

Given the above, should I call dell and ask them not to do a WiFi replacement and instead replace the whole ultra-book or is this such a common issue that I will get the same thing again?

I was sooooo looking forward to this 'system' and to get my hands on it. But now, I am not sure. I do love how it feels, looks, how quit it is, and its overall potential but for a system that costs as much as it does, I can't have these issues both in terms of functionality and price. The above is just Day 1, about 10 hours.

Any advice would be greatly appreciated.